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Product Name: Dibutyl Phosphite
Chemical Formula: C8H19O3P
Synonyms: Phosphorous acid, dibutyl ester
CAS Number: 107-66-4
Recommended Use: Chemical intermediate, plasticizer, agrochemical additive
Manufacturer/Supplier: Industrial chemical suppliers, specialty chemical distributors
Emergency Contact: Local emergency response center or Poison Control
GHS Classification: Acute toxicity (oral, skin), serious eye irritation, skin sensitization
Label Elements: Signal word: Warning
Hazard Statements: Harmful if swallowed or inhaled, causes moderate skin and eye irritation, may cause respiratory discomfort
Precautionary Statements: Avoid breathing vapors, use in well-ventilated areas, wash hands after handling, wear protective gloves and goggles
Chemical Name: Dibutyl Phosphite
CAS Number: 107-66-4
Concentration: ≥98%
Impurities: Trace amounts of butanol-related byproducts
Inhalation: Move person to fresh air immediately, seek medical attention if symptoms develop, such as dry cough or difficulty breathing
Skin Contact: Rinse skin thoroughly with soap and water, remove contaminated clothing, seek medical advice if irritation persists
Eye Contact: Flush eyes with plenty of water for at least 15 minutes, keep eyelids open, get medical help if discomfort continues
Ingestion: Do not induce vomiting, rinse mouth thoroughly with water, call a physician or poison control center without delay
Suitable Extinguishing Media: Water spray, alcohol-resistant foam, dry chemical, carbon dioxide
Unsuitable Extinguishing Media: Avoid direct water jet as it may spread material
Specific Hazards: Releases toxic phosphorus oxides and carbon oxides on combustion, can produce irritating or corrosive fumes
Special Protective Equipment for Firefighters: Wear full protective gear, including self-contained breathing apparatus, approach upwind to avoid vapors
Personal Precautions: Evacuate area, ventilate space, avoid contact with skin, eyes, and clothing, control sources of ignition
Environmental Precautions: Prevent entry into drains, sewers, and waterways, use containment to prevent spreading
Methods for Clean-up: Absorb with inert material such as sand, shovel material into appropriate closed container, decontaminate affected surfaces with suitable detergent
Safe Handling: Use only with adequate ventilation, avoid inhalation and prolonged contact, use proper personal protective equipment, keep away from open flames and hot surfaces
Storage Conditions: Store in tightly sealed containers in a cool, dry, and well-ventilated location, protect from direct sunlight and incompatible substances
Incompatible Materials: Strong oxidizers, strong acids, moisture-sensitive compounds, bases, and strong alkalis
Occupational Exposure Limits: No specific regulatory limits set, best practice to keep levels low, following local guidelines
Engineering Controls: Use fume hoods, local exhaust, or mechanical ventilation
Individual Protection: Chemical-resistant gloves, splash goggles, lab coat or chemical-resistant clothing, proper respiratory protection (NIOSH or EN approved) if airborne concentrations become high
Hygiene Measures: Wash hands before eating, drinking, or using restroom, avoid contaminated clothing, practice good household cleaning standards for chemical work areas
Appearance: Clear, colorless to pale yellow liquid
Odor: Mild, ester-like
pH: Not applicable in liquid state
Melting Point: Below -70°C
Boiling Point: 243°C
Flash Point: 114°C (closed cup)
Evaporation Rate: Not established, low volatility
Vapor Pressure: 0.17 mmHg at 25°C
Solubility: Slightly soluble in water, freely soluble in alcohols and organic solvents
Viscosity: Moderate, flows slowly at room temperature
Density: 1.002 g/cm³ at 20°C
Chemical Stability: Stable under recommended storage conditions, breaks down at high temperatures
Reactivity: May react with strong oxidizers, acids, and strong alkalis
Hazardous Reactions: Can generate hazardous phosphorus oxides and butene vapors with heat or acid
Hazardous Decomposition: Carbon oxides, phosphorous oxides, volatile organic compounds
Acute Toxicity: Oral LD50 (rat): Approx. 1600 mg/kg, can cause gastrointestinal upset, nausea, headache
Skin and Eye Irritation: Mild to moderate irritant; repeated exposure causes redness and discomfort
Respiratory Effects: Aerosols may lead to coughing, sore throat, and chest tightness
Sensitization: Not identified as a sensitizer in studies
Chronic Effects: Long-term exposure may impact liver and kidneys in laboratory animals
Carcinogenicity: Not included on IARC, NTP, or OSHA lists
Aquatic Toxicity: Toxic to aquatic organisms, may cause long-term effects in water environments
Persistence and Degradability: Readily decomposes under environmental conditions, but bioaccumulation has not been observed
Bioaccumulation Potential: Low, based on chemical structure and test data
Mobility in Soil: Medium mobility in moist soil, binds to organic fractions
Waste Treatment Methods: Disposal must take place in a chemical incinerator in accordance with local, regional, national, and international regulations
Container Disposal: Triple rinse containers before recycling or disposal, treat rinsate as hazardous waste
Precautions: Always follow standard chemical hygiene practices, prevent environmental discharge, use certified waste contractors
UN Number: Not classified for transport under most road, rail, or air regulations, check for regional variation
Transport Hazard Class: Considered non-hazardous for freight, but care must be taken for bulk loads
Packing Group: Not applicable for most types, secure well to prevent leaks or spills
Special Transport Notes: Use closed, labeled containers, protect from damage during transit, emergency response guide available from manufacturer or shipper
OSHA Status: Handled as an industrial chemical, safety data required for workplace use
SARA Title III (Sections 302/304): Not listed as an extremely hazardous substance, but spills should be reported according to local mandates
TSCA Inventory: Listed
REACH Registration: Registered or pre-registered for industrial use in the EU
California Proposition 65: Not on the list of chemicals known to cause cancer, birth defects, or reproductive harm
WHMIS Classification (Canada): Subject to control, general workplace hazard
Other International Regulation: Check regional rules for safe use, storage, and environmental protection requirements
